/* PRACTICALSERIES (c) 2016 ******************************************************************************* Title : RESPONSIVE GRID ARRANGEMENT ******************************************************************************* PRACTICALSERIES: 22 Vicarage Road, Chester, United Kingdom CH2 3HZ Email: mg@practicalseries.com www.practicalseries.com ------------------------------------------------------------------------------- DETAILS This file creates a responsive grid system with up to six columns. The columns are designed to fit the Practical Series web page, this has a maximum width of 1276 px and is configured in a Karl Gerstner 5 column grid arrangement. The KG grid divides the width into 58 units (this being 22 px) and there are two such units between each column; thus the margin on each column at maximum width is 44 px (margins are always on the left of a column excepting the first column). In percentage terms this is a margin of 3.45 % (approximately). The grid is constructed in rows and columns; these are given the class names: .rg-row .rg-col Further classes exist to divide the column into sub columns of different widths (i.e. can span multiple columns). The classes all have names in the format .rg-spanS-C where: S is the span (2=span 2 columns) C is the number of columns Thus .rg-span2-3 would span 2 column widths in a thress column grid Class Column Arrangement Span Arrangement Column width -------------+-----------------------+--------------------------+--------------- .rg-span1-2 | 2 column arrangement | spans 1 of the columns | 48.27 .rg-span2-2 | 2 column arrangement | spans both columns | 100.00 | | | .rg-span1-3 | 3 column arrangement | spans 1 of the columns | 31.03 .rg-span2-3 | 3 column arrangement | spans 2 of the columns | 65.51 .rg-span3-3 | 3 column arrangement | spans all columns | 100.00 | | | .rg-span1-4 | 4 column arrangement | spans 1 of the columns | 22.41 .rg-span2-4 | 4 column arrangement | spans 2 of the columns | 48.27 .rg-span3-4 | 4 column arrangement | spans 3 of the columns | 74.13 .rg-span4-4 | 4 column arrangement | spans all columns | 100.00 | | | .rg-span1-5 | 5 column arrangement | spans 1 of the columns | 17.24 .rg-span2-5 | 5 column arrangement | spans 2 of the columns | 37.93 .rg-span3-5 | 5 column arrangement | spans 3 of the columns | 58.62 .rg-span4-5 | 5 column arrangement | spans 4 of the columns | 79.31 .rg-span5-5 | 5 column arrangement | spans all columns | 100.00 | | | .rg-span1-6 | 6 column arrangement | spans 1 of the columns | 13.79 .rg-span2-6 | 6 column arrangement | spans 2 of the columns | 31.03 .rg-span3-6 | 6 column arrangement | spans 3 of the columns | 48.27 .rg-span4-6 | 6 column arrangement | spans 4 of the columns | 65.51 .rg-span5-6 | 6 column arrangement | spans 5 of the columns | 82.75 .rg-span6-6 | 6 column arrangement | spans all columns | 100.00 The formulae used to give the width percentage of the span is: 100 x Span Span SpanWidth(%) = ---------- - MarginWidth ( 1 - ---- ) Col Col Note: MarginWidth is 3.45 % RESPONSIVE ARRANGEMENT The responsive grid has a maximum row width of 1276 px, and columns are generally stacked side by side, at lower widths, the columns will stack vertically; the point at which this occurs is a screen width at or below 520 px. ------------------------------------------------------------------------------- MODIFICATION HISTORY: This is a complete summary of all software modifications. Date Issue Author Reason for Modification ------------------------------------------------------------------------------- 23 Oct 2016 D01.00 M. Gledhill First development release 23 Sep 2016 D00.20 M. Gledhill Code comments complete and checked 06 Sep 2016 D00.01 M. Gledhill Development ---------------------------------------------------------------------------- */ /* **************************************************************************** RESPONSIVE GRID - ROW DEFINITION (.rg-row) **************************************************************************** Each row can contain up to six columns (if the number of columns is to change for different parts of the page, a new row must be defined for each). The first class definition defines the maximum page width (1276 pixels). The subsequent before and after pseudo elements force the .row class to self-clear (clearfix hack) to prevent floating problems. ------------------------------------------------------------------------- */ .rg-row { /* sets the basic row width and properties */ max-width: 1160px; /*min-width: 520px;*/ margin: 0 auto; padding: 0; /*background-color: #fff;*/ } .rg-row:before, /* IE 9 support */ .rg-row:after { /* ClearFix */ content:""; display:table; } .rg-row:after { clear:both; } @media only screen and (max-width: 1200px) { .rg-row { width: 98%; margin: 0 1%; } } /* **************************************************************************** RESPONSIVE GRID - COLUMN DEFINITION (.rg-col) **************************************************************************** Each column in a row is defined with the KG Grid margin of 1.72 % on the left (see header for detail). The first column does not require this left margin and this is set to zero using the :first-child pseudo class. At low screen widths (<=520 px), the columns stack vertically and at this point all column margins are removed (by media query) ------------------------------------------------------------------------- */ .rg-col { /* sets the basic column width and properties */ display: block; float: left; margin: 1% 0% 0% 3.45%; } .rg-col:first-child { margin-left: 0; } /* remove left margin from first column */ /* ---------------------------------------------------------------------------- Remove margins at lower screen widths (columns stack at this point): 520 px ------------------------------------------------------------------------- */ @media only screen and (max-width: 520px) { .col { margin: 0; } } /* **************************************************************************** RESPONSIVE GRID - SPAN CONTROLLS **************************************************************************** Each column spans an area of the row, taking a three columns width arrangement, this can be arranged in four different ways: - three columns of single column width - span1-3 (span 1 column of 3) - one double width column - span2-3 (span 2 columns of 3) and a single column (span1-3) - one single width column - span1-3 and a double column (span2-3) - finally a single triple width column - span3-3 (span 3 columns of 3) |<------------------------- width of screen ----------------------->| |<---- span1-3 ------>| |<---- span1-3 ----->| |<---- span1-3 ------>| |<----------------- span2-3 ----------------->| |<---- span1-3 ----->| |<---- span1-3 ----->| |<----------------- span2-3 ----------------->| |<---------------------------- span3-3 ----------------------------->| The widths of each column are determined by the table in the header and implemented in the following classes. At screen widths of 520 px and less, all spans are set to 100 % width (columns stack at this point) ------------------------------------------------------------------------- */ /* ---------------------------------------------------------------------------- Two column span arrangements ------------------------------------------------------------------------- */ .rg-span1-2 { width: 48.27%; } .rg-span2-2 { width: 100%; } @media only screen and (max-width: 520px) { /* stack columns at <=520 px */ .rg-span1-2, .rg-span2-2 { width: 98%; margin:0 1%; }/* by making all columns 100 % (effectively, small margin) */ } /* ---------------------------------------------------------------------------- Three column span arrangements ------------------------------------------------------------------------- */ .rg-span1-3 { width: 31.03%; } .rg-span2-3 { width: 65.51%; } .rg-span3-3 { width: 100%; } @media only screen and (max-width: 520px) { /* stack columns at <=520 px */ .rg-span1-3, .rg-span2-3, .rg-span3-3 { width: 100%; padding:0 1%; } /* by making all columns 100 % (effectively, small margin) */ } /* ---------------------------------------------------------------------------- Four column span arrangements ------------------------------------------------------------------------- */ .rg-span1-4 { width: 22.41%; } .rg-span2-4 { width: 48.27%; } .rg-span3-4 { width: 74.13%; } .rg-span4-4 { width: 100%; } @media only screen and (max-width: 520px) { /* stack columns at <=520 px */ .rg-span1-4, .rg-span2-4, .rg-span3-4, .rg-span4-4 { width: 98%; margin:0 1%; } /* by making all columns 100 % (effectively, small margin) */ } /* ---------------------------------------------------------------------------- Five column span arrangements ------------------------------------------------------------------------- */ .rg-span1-5 { width: 17.24%; } .rg-span2-5 { width: 37.93%; } .rg-span3-5 { width: 58.62%; } .rg-span4-5 { width: 79.31%; } .rg-span5-5 { width: 100%; } @media only screen and (max-width: 520px) { /* stack columns at <=520 px */ .rg-span1-5, .rg-span2-5, .rg-span3-5, .rg-span4-5, .rg-span5-5 { width: 98%; margin:0 1%; } /* by making all columns 100 % (effectively, small margin) */ } /* ---------------------------------------------------------------------------- Six column span arrangements ------------------------------------------------------------------------- */ .rg-span1-6 { width: 13.79%; } .rg-span2-6 { width: 31.03%; } .rg-span3-6 { width: 48.27%; } .rg-span4-6 { width: 65.51%; } .rg-span5-6 { width: 82.75%; } .rg-span6-6 { width: 100%; } @media only screen and (max-width: 520px) { /* stack columns at <=520 px */ .rg-span1-6, .rg-span2-6, .rg-span3-6, .rg-span4-6, .rg-span5-6, .rg-span6-6 { width: 98%; margin:0 1%; } /* by making all columns 100 % (effectively, small margin) */ }